Drying apparatus



B. S. SNOW DRYING APPARATUS Nov. 4 1924.

Filed April 14, 1922 s suena-sheer 1 mi Sx lw :Z5/werf" jaw??? 5770 gig/ra@ Nov. 4 1924. Y

B. S. SNOW DRYING APPARATUS Patented Nov. si, 1924. l

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1,514,265 reni oFFlcE.

BARTON s. snow, or entravrn, immers, nssrenon 'ro r. w. snow CONSTRUCTION '4 co., or cnicas-c, immers, .e ccnrcnnrron or ILLINOIS.

DBIYING APPARATUS.

Application filed April la, 1922. Serial No. 552,683.

To all 107mm 'it may concern n Be it known that l. BARTON S. Sxow, a citizen of the United States. residing at '5atavia, in Ithe countj.T of Kane and State of Illinois, have invented a new and useful improvement in Drying i'-i pparatus` of which the following is a specification.

My invention relates, more particularly, lto apparatus for drying sand, though Ido not wish to be understood as intending to limit it to such material.

My primary object is to provide an iniproved construction of drier, for sand and other material, which will be rendered more eflicient, more economical of operation and be capable of a larger output of dried material than structures of this general char` acter as hitherto provided.

Referring to the accompanying drawings:

Figure 1 is a view in side elevation of a drying apparatus constructed in accordance with my invention. Figure 2 is a longitudinal sectional elevational view taken at a line midway between the sides of the ap! paratus. Figure 3 is a section taken at the line 3-3 on Fig. 1 and viewed in the direction of the arrow. Figure L is a plan section taken at the line 4.-4: on lFig. 2 and viewed in the direction of the arrow. Figure 5 is a cross-sectional view taken through a side. portion of the apparatus at the line 5-5 Aon Fig. 1 and viewed in the direction 0f the arrows and showing one of the similar doors controlling the discharge of gravel from the receptacle into which the wet sand `is introduced, and the means for controlling the positionoccupied by the doors, the doors being shown closed; and Figure 6, a view like Fig. 5 showing the door in open condition. y

The structureshown comprises a furnace represented generally at 7, the upper,r o-pen end thereof, through which the products of combustion pass, opening through the bottom wall of a substantially horizontally extending .flue 8, at the forward endfof the latter, this flue being shown as supported at one end upon the furnace 7 and at its rear end upon a frame represented generally at 9. The flue 8 is of general triangular shape in cross-section, as represented and presenting the upwardly-converging walls 10. The rear end of the flue 8 opens, at itsupper portion, at an opening indicated at 11, into the rear end of a substantially horiz*ont'ally.-y disposed Hue 12 extending lengthwise of the fine 8 and terminating at its forward end in an upwardly-extending portion 13 formi.:

ing an outlet for the products of combus-V tion which pass from the furnace 7 vthrougl'i theflue 8, thence to the tlue-r12 andwforwardly through the latter; to the.point of discharge, the flue 12 being preferablyk verti- "15J cally spaced from the flue 8 as represented in Fig. 2. ,f urmounting the flue 8 is a. receptacle 14 for receiving the sand to be dried, this receptacle beingshown as provided with the il the upper extremities of which, represented i atA 18, converge upwardly, the part ofthe grid structureformed of the portio-nsw18l being capped by an angle-plate 19.` yThe grid structure described, which extends the full length of the Hue 8, is of a form,fas shown, presenting slots which extend in a direction crosswise of the flue 8, the, grid structurereferred to serving as a means fory retaining the sand in the receptacleV 14 un til it has become dried as hereinafter described, whereupon it falls out of the re-kr ceptacle 14 through the openings provided by the grid. The walls` 15 contain in their lower edges openings 20 which are con,- trolled by swinging doors 21 hinged at their upper edges, as represented at 22, to thev upper edges of the openings 20, these doors being each formed with an inwardly-extendf ingflange 23 which extends, when the ,doorsr grid, as shown more particulaijly in Figs. k11o.4

5 and 6.

loo'

Vreceive bars 31 which when laid tlatwise in these recesses serve to hold the doors 2l closed, and when displaced and turned edgewise permit these doors to swing to the desired open position represented in Fig. 6.

The bottom of the casing 26, which latter is open at its rear end as represented at 32, inclinesv downwardly from the front end of the apparatus and extends around the sides and rear wall of the furnace 7 as represented, forming a chute into which the sand and gravel after being dried, discharge. Located at the rear end of the ap paratus, and in a position to receive the material discharging troni the casing 26 at its wherebyA discharge for the moist air in the therethrough.

open end 32, is a pipe 33, the upper, open,

end of which, represented at 34, is widely flaring and vso disposed, as shown,'that the material discharging through the outlet 32 will'be received and guided into the pipe 33 for discharge to any desired point.

l The opening inthe end wall of the casing through which the line 12 extends, this opening being represented at 35, is of such area that an annular space is provided lwhich opens into a pipe 36 connected with the endV wall referred to and surrounding, 1n spaced yrelation thereto, the portion of the Hue 12 extending outwardly beyond this wall enclosure afforded between the portions of the grid, is provided.

The operation ot' the apparatus is as `ollows: The sand to be dried is charged into the receptacle 14, preferably to lill the latter and thus extend against all oit the exposed portion of the grid, the openings in which are of such size that the sand, in wet condition, is prevented from dropping Assuming the furnace to be operating, the` products of combustion in passing` through the lues 8 and 12 and radiating heat therefrom, dries the sand which exi tends in Contact with the grid andas the .sand dries it drops through the grid, falling upon the outer surfaces of the flues 12 and 8, ruiming down the sides of the'latter kand discharging into the casing 26, .and

thence to the pipe 33. The gravel, or other bodies which may be contained in the sand and which are too largey to pass through. the

yOpeningsin the grid, upon becoming dried, ,y gravitate along the surfaces of the grid on the inside ci the receptacle 1li, and, as desired, are permitted to discharge from the receptacle 1e into the easing 27 by the operatcr displacing the bars 31 to the position shown in Fig. 6.

lt will be understood from the 'r'oregoing that the grating, or grid, prevents the wet sand from contacting with the hot wall of the heat fines 8 and 12 and thereby avoids burning out the latter, and the spacing ot the grid from the iiues aiords an air space between the grid and tlues through which air may pass upwardly, and carry oli' the moisture evaporated 'from the material being dried, the moisture-laden air discharging from the apparatus through the passage 36.

The vfeature of providing the sloping grating in connection with the provision ot the out-iets at the lower portions of the walls of the receptacle 14 through which the gravel and other relatively large solid particles are permitted to discharge, but through which the wet sand will not pass, is ot advantage as it renders the structure seltcleaning, which makes for efficiency and economy of operation.

The provision of the heat liuc with the return bend, both portionsV ot which are so positioned relative to the grating' as to operate to dry the sand, is oit advantage particularly because it permits of the utilization, to the maximum'degree, of the heat supplied to the dues, while permitting the apparatus to be provided as a very compact structure.

While I have illustrated and described a particular construction' embodying my invention, I ydo not wish to be understood as intending to limit it thereto, as the same may be variously modilied and alteredwithout departing trom the spirit oi my invention. v.

TWhat l claim as new, and desire to secure by Letters Patent, is: v

1. A drier comprising a member in the form of a grating extending in a substantially horizontal direction and sloping in'a direction crosswise of its length and against which the material to be dried bears, and a heat flueextending lengthwise of said grating and having a wall spaced from and ex tending below said grating.

2. A drier comprising a member in the :torni of a grating extending in a substantially horizontal direction and sloping in a directionc-rosswise of its length and against which the material to be dried bears, and a heat iue extending lengthwise of said Trating and having a wall spaced from, and extending below, said grating in substantially parallel relation thereto.

3. A drier comprising a member in the form of a grating extending in a substan# tially horizontal direction and sloping in a imanes direction crosswise of its length and against which the material to be dricdbears, and a heat due extending lengthwise of said grating and having a sloping walt located adjacent to said grating and upon. which the ma- Jrerial drops Atroni said grating.

d. il drier comprising a member in ythe form of a grating and against which the material to be dried bears, and a heat iiue having a return portion with both portions of said flue extending in a position to heat the material bearing against said grating.`

A drierl comprising a. member in the form of a grating and against which the material to be dried bears, and a heat flue having a retuin portion located above, and extending in the same general direction as, the other portion of said iiue, saidgrating extending in such position relative to both portions of said flue that the heat therefrom dries the material bearing against said grating.

6. A drier comprising a member in the form of a grating and Vagainst which the material to be dried bears, and a. heat iiue having a portion presenting a sloping wall and a return portion above the portion presenting the sloping wall, said grating extending above said sloping wall and adjacent said return flue, for the purpose set forth.

7. A drier comprising a member presenting substantially horizontally extending upwardly-converging portions in the form of a grating and against which the material tor be dried bears, and a heat flue extending lengthwise of said upwardly-converging portions and having upwardly converging walls located below, and spaced from, said upwardly-converging portions, of said grating. f

8. A drier comprising a member presentng upwardly-converging portions, and portions extonding upwardly therefrom, in the form of a grating and against which the material to be dried bears, and a heat due having a portion extending between and spaced from said upwardly-converging portions of said grating and another portion extending between the upwardly-extending portions of said grating.

9. A drier comprising a member present ing upwardly-converging portions, and portions extending upwardly therefrom, in the form of a grating and against which the material to be dried bears, and a heat flue having a portion extending between and spaced from said upwardly-converging portions of said grating, said portionv of said heat flue presenting upwardly-converging walls and another portion extending between the upwardly-extending portions of said grating.

l0. A drier comprising a receptacle for the material to be dried and having portions against which the material to be driedv solid bodies, of a size too large to pass through said grating, a flue extending lei gthwise of said grating and having upwardly-converging walls, said iiue extending below and in spaced relation to said grating and ha\.ing a return portion extending ab` ve the other portion of said this and located between the portions of said grating.

ll. A drier comprising ya in ei'nber presenting upwardll'-coiive.i'ging portions, and portions extending upwardly therefrom, in the form of a grating and against which they material to bedried bears, and a heat flue having aportion extending between and spaced .from said upwardly-conrerging portions of said grating and 'another portion 1extending between the upwardly-extending portions of said grating, said portions of said heatflue extending in non-vertical po- .material to be dried bears, and a heat flue having a portion extending between and spaced from said upwardly-converging portions of vsaid grating, said portion of said heat Aiiue presenting upwardly-converging walls and another `portion extending between the upwardly-extending lportions of said grating, said portions of said heat iiue extending in non-vertical position.

13. A drier for the purpose set forth comprising a member in the form of a grating and against which the material to be dried bears, means for subjecting to heat the material bearing against said grating, and means for directing the hot dry sand which. passes through said grating, and the gravel which is intercepted by said grating, into contact with eachother while said sand is in heated condition.

14. A drier for the purpose set forth comprising aysloping member in the form yof a grating and against which the material to be dried bears, means for subjecting to heat the material bearing against said grating, and means for directing the hot dry sand which passes through said grating, and the gravel which is' intercepted by said grating,

into contact with each other while said sand `is in heated condition.

15. A drier for the purpose set forth com- 16. A; drier for the purpose set forth comprising a slcpino member in the form of a grating and against which the material to be dried bears, means for subjecting to heat the material bearing against said grating, and meansfor causing the gravel intercepted by said grating 'to be fed continuously to,

and for intermixture With, the hot dry sand.

the flow of that portion only of the material which is intercepted by said grating.

18. A.y drier for the purpose set forth comprising a sloping member in the form of a vgrating' and against Which the material to be dried bears, and means for subjecting to heat the material bearing against said grating,

`:garages the drier having a closure-equipped portion through which the gravel intercepted by the grating discharges, said closure controlling the tion' of that portion only of the material which is intercepted by said grating.

` 19. A drier for the purpose set forth cornprising a member in the form of a grating and against which the material to be dried bears. and means for subjecting to heat the material bearing against said grating, ythe drier being provided With a portion through Which the gravel intercepted by the grating passes for discharge into the dry sand.

20. A drier for the purpose set forth comprising sloping member in the form of a grating and against which the material to be dried bears, and means for subjecting to heat the material bearing against said grating, the drier being provided With a portion through Which the gravel intercepted by the grating passes for discharge into the dry sand.

BARTON S. SNOl/V. 

